Title

Effect of hydration layer and surface wettability in enhancing thermal conductivity of nanofluids

Authors

Authors

P. Sachdeva;R. Kumar

Abbreviated Journal Title

Appl. Phys. Lett.

Keywords

colloids; liquid theory; molecular dynamics method; nanoparticles; solvation; suspensions; thermal conductivity; water; wetting; MOLECULAR-DYNAMICS; SIMULATION; LIQUID; WATER; Physics, Applied

Abstract

In a molecular dynamics study of water based nanofluids, we show that a hydration layer is formed at the particle-fluid interface, where the attraction or cohesive potential between the liquid molecules is dominant. In the hydration layer, the collision mode rather than the kinetic or potential mode is primarily responsible for the enhancement of thermal transport properties in nanofluids, as it results in more interactions. The thermal conductivity for a wetting particle is found to be higher than for a neutral or a nonwetting particle.

Journal Title

Applied Physics Letters

Volume

95

Issue/Number

22

Publication Date

1-1-2009

Document Type

Article

Language

English

First Page

3

WOS Identifier

WOS:000272627600064

ISSN

0003-6951

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